JpGU-AGU Joint Meeting 2020

講演情報

印刷

[E] 口頭発表

セッション記号 M (領域外・複数領域) » M-IS ジョイント

[M-IS19] Conservation of geoparks, natural geosites, and cultural heritage: weathering and damage assessment

コンビーナ:Luigi Germinario(Saitama University)、Celine Schneider(University of Reims-Champagne-Ardenne)、小口 千明(埼玉大学大学院理工学研究科)、藁谷 哲也(日本大学大学院理工学研究科)、Miguel Gomez-Heras(Universidad Autonoma de Madrid)、Patricia Vazquez(GEGENAA EA 3795 University of Reims Champagne-Ardenne)、Magdalini Theodoridou(Cardiff University)、宋 苑瑞(早稲田大学)

[MIS19-02] Detection of microcracks in rock specimens due to thermal changes using the acoustic emission method

*藁谷 哲也1 (1.日本大学大学院理工学研究科)

キーワード：熱風化、微小亀裂、アコースティックエミッション、熱膨張特性

The acoustic emission (AE) method can detect microcracks that occur inside rocks. In this study, using the AE method, the temperature change of 80 ℃ at a temperature gradient of 2 ℃/min was given to three kinds of rock specimens (granite, marble, and sandstone) often used for stone cultural heritages, and the microcrack formation was monitored. As a result, it was found that the AE amplitude was largest in the granite specimen and decreased in order of the marble and the sandstone specimens. The AE generation is thought to depend on the mineral composition, the thermal expansion properties of minerals, and the porosity.